Null hypothesis and the alternate hypothesis.

Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population? With a failure to reject the null hypothesis, can we make a general statement about the population based on the sample findings?

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Hi,
I will explain to you what you need to know.

The goal of statistical testing is to see if there exists a difference between two group. For example, let's say that a researcher wants to see if studying while playing music will result in higher grades. The researcher will take a class, and divide the class randomly in two. One group will be told to study with music on, the other was told to study in silence. Then, both groups will be given the same exam. The researcher will then look at the grades, and see if any difference exists between the two groups.

So essentially, we start stating stating a null hypothesis. In statistics, a null hypothesis (Ho) is a hypothesis (scenario) set up to be nullified, refuted, or rejected ('disproved' statistically) in order to support an alternative hypothesis. So null is the case where the results have no significant differences. In this case, our null ...

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This posting explains the basic information needed to know when conducting statistical testing using hypothesis.

If the intent for research is to try to prove thenullhypothesis is true without giving any indication that something else may be proved (alternatehypothesis), then, what is the proper format for stating thenullhypothesis?
eg. The Chamber of Commerce estimates that "Richmond families, on the average, dine out at least 3

Thehypothesis is that the Southerners are less educated than the population at large. Now keep in mind that because this is a one tailed test, you can interchange thenullandthealternatehypothesis. Also, null is usually given the benefit of the doubt. Thus the '=' sign goes with thenull. In this case because we have to pro

Perform a 5 step hypothesis test on the given data for the following nulland alternative hypothesis:
NullHypothesis - TB is greater in the U.S. than foreign countries between 1993-2009
Alternative Hypothesis - TB is less in the U.S. than in foreign countries between 1993-2009.
See the attached files.

Please see the attached file.
A hypothesis test is used to test a claim. You get 1.75 as your test statistic and 1.59 as your critical value for a right-tailed test. Which of the following is the correct decision statement for the test?
A. Reject thenullhypothesis
B. Claim thenullhypothesis i

What is the purpose of a hypothesis test? What goes in thenullhypothesisand what goes in thealternatehypothesis? Why is it inappropriate to put a sample statistic in thehypothesis?
If you are testing thehypothesis
H0: population proportion is .5
H1: population proportion is not .5,
and you get .52 for the sample

According to the U.S. federal Highway Administration, the mean number of miles driven annually is µ=12,200. An insurance agent in Montana believes that the mean number of miles driven by the residents of his state is higher than the national average. A random sample of 35 drivers is taken from the list of registered drivers in